Nightmare Nidoking is Nidoking's Nightmare form, from the Nightmare World: darker, with 20% more health and move damage than a normal Nidoking, and able to grow all the way to level 999.
Awakening a Nidoking
Raise a Nidoking to 5★ and level 100, then Awaken it from its details window with 10 Nightmare Shards and 100,000 gold. It becomes Nightmare Nidoking (rank ☾1, level cap 200), and its Nightmare ranks take it up to 999.
Where it appears
It defends these Nightmare World maps (open from trainer level 100). A won battle there drops a Nightmare Pokémon 1 in 500 times, already Awakened, up to level 200:
| Map | Region | Level |
|---|---|---|
| Nightmare Union Cave | Nightmare Dread | 365 |
| Nightmare Great Marsh | Nightmare Dread | 551 |
| Cursed Mines | Nightmare Inferno | 834 |
What changes
- It keeps its genes, moves, traits and held item; holding its Mega Stone, it becomes a Nightmare Mega.
- It wears no costume.
- In the Arena it fights at level 100 at most, with a normal form's stats.
- A shiny can't become a Nightmare form: it Ascends instead.